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techtalk:ih:engctl01c [2018/09/17 02:47] hippysmack [Prestolite Electronic Ignition System] |
techtalk:ih:engctl01c [2018/09/17 15:09] hippysmack [Prestolite Electronic Ignition System] |
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| **(1979)** Upgrade to the breaker point system in which the mechanical points are replaced by a breaker-less electronic ignition on the camshaft. Timer has a rotor with one small lobe and one large lobe and a sensor that sends signal to the control module on the back of the timer inner cover. Rotor is mounted on a mechanical flywheel centrifugal advance like a point cam would be in a breaker point system. The rotor's small lobe fires the front cylinder and the large lobe fires the rear cylinder. ((1959-1985 Clymer Sportster Repair Manual pg 225))1979 Ignition Module Assembly part number 32598-78 ((1979 HD Sportster Parts Catalog)). | **(1979)** Upgrade to the breaker point system in which the mechanical points are replaced by a breaker-less electronic ignition on the camshaft. Timer has a rotor with one small lobe and one large lobe and a sensor that sends signal to the control module on the back of the timer inner cover. Rotor is mounted on a mechanical flywheel centrifugal advance like a point cam would be in a breaker point system. The rotor's small lobe fires the front cylinder and the large lobe fires the rear cylinder. ((1959-1985 Clymer Sportster Repair Manual pg 225))1979 Ignition Module Assembly part number 32598-78 ((1979 HD Sportster Parts Catalog)). | ||
| + | |{{:techtalk:ih:engctl:prestolite_ignition_by_joshstrange2.jpg?direct&400|}} ((photo by joshstrange2 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1995856))| | ||
| * **In November of 1978**, the MoCo issued a few recommendations to dealers to handle issues with the leaned out condition related to this new ignition system. Motorcycles operate with leaner air/fuel mixtures and are more sensitive to carburetor mixture settings / ignition spark. ((HD Service Bulletin #M-739 dated November 3, 1978)) | * **In November of 1978**, the MoCo issued a few recommendations to dealers to handle issues with the leaned out condition related to this new ignition system. Motorcycles operate with leaner air/fuel mixtures and are more sensitive to carburetor mixture settings / ignition spark. ((HD Service Bulletin #M-739 dated November 3, 1978)) | ||
